The interpretation timeline
1 Kings 18:44 Douay-Rheims

And at the seventh time, behold, a little cloud arose out of the sea like a man’s foot. And he said: Go up and say to Achab: Prepare thy chariot and go down, lest the rain prevent thee.

A.D. 430 – 1871 6 witnesses

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“After this blessed Elijah presented himself to the king, "went up to Mount Carmel and put his head between his knees," praying the Lord to send rain on the earth. "And he said to his servant, 'Look toward the sea.' " When the boy reported that he saw nothing at all, he told him, "Go and look seven times." The seventh time he returned and said, " 'I see a little cloud rising out of the sea like a person's foot.' And suddenly the heavens grew dark, and there fell a great rain." For this reason, as we said, Elijah prefigured our Lord and Savior. Elijah prayed and offered sacrifice; Christ offered himself as a spotless sacrifice for the whole world. Elijah prayed for rain to come on the earth; Christ prayed that divine grace might come down into the hearts of humankind. When Elijah told his servant, "Go and look seven times," he signified the sevenfold grace of the Holy Spirit that was to be given to the church. When he declared that he saw a little cloud rising out of the sea, it prefigured the body of Christ, which was to be born in the sea of this world. Therefore, lest anyone doubt, he said that the cloud had the foot of a person who said, "Who do people say the Son of man is?" After three years and six months, rain came down from heaven at the prayer of Elijah, because at the coming of our Lord and Savior the rain of the word of God happily watered the whole world during the three years and six months in which he deigned to preach. Just as at the coming of Elijah all the priests of the idols were killed and destroyed, so at the advent of the true Elijah, our Lord Jesus Christ, the wicked observances of the pagans were destroyed.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“Harness your [horses to the carriage] and go down. Harness your [horses to] your chariots and go down quickly from Mount Carmel, to return to your house, otherwise the rain will press you on the way.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And the hand of the Lord was on Elijah,.... Giving him more than common strength of body, as well as courage and fortitude of mind; so the Targum, the spirit of strength from the Lord was with him: and he girded up his loins; gathered up his long loose garment, and girt it about him, that he might be more fit for travelling: and ran before Ahab to the entrance of Jezreel; reckoned about sixteen miles from Carmel (l); this showed his humility, that he was not elated with the wonderful things God had done by him, and that he bore no ill will to Ahab, but was ready to show him all honour and respect due to him as a king; and that it were his sins, and not his person, he had an aversion to; and that he was not afraid of Jezebel, and her prophets, but entered into the city where she was, to instruct the people, and warn them against her idolatries; though some think he went no further than the gate of the city, prudently avoiding falling into her hands. (l) Bunting's Travels, &c. p. 204. Next: 1 Kings Chapter 19”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“There ariseth a little cloud out of the sea, like a man's hand. - ככף איש kechaph ish, like the hollow of a man's hand. In the form of the hand bent, the concave side downmost. I have witnessed a resemblance of this kind at sea previously to a violent storm, a little cloud the size of a man's hand first appearing, and this increasing in size and density every moment, till at last it covered the whole heavens, and then burst forth with incredible fury. Mr. Bruce mentions a similar appearance in Abyssinia: - "Every morning, in Abyssinia, is clear, and the sun shines. About nine a small cloud, not above four hundred feet broad, appears in the east, whirling violently round, as if upon an axis; but arrived near the zenith, it first abates its motion, then loses its form, and extends itself greatly, and seems to call up vapours from all opposite quarters. These clouds, having attained nearly the same height, rush against each other with great violence, and put me always in mind of Elijah foretelling rain on Mount Carmel." - Travels, vol. v., page 336, edit. 1806.”
Source
1849
A.D.
1774–1849
“Sea, the Mediterranean, which could be seen from Carmel. (Haydock) — Hence the rain commonly came in that country, Luke xii. 54.”
1871
A.D.
1871
“Behold, there ariseth a little cloud out of the sea, like a man's hand--The clearness of the sky renders the smallest speck distinctly visible; and this is in Palestine the uniform precursor of rain. It rises higher and higher, and becomes larger and larger with astonishing celerity, till the whole heaven is black, and the cloud bursts in a deluge of rain. Prepare thy chariot, and get thee down, that the rain stop thee not--either by the river Kishon being suddenly so swollen as to be impassable, or from the deep layer of dust in the arid plain being turned into thick mud, so as to impede the wheels.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.